Arrays C++- CS 172 Exercise #1

Front

What is an array in C++?

Back

An array is a collection of elements of the same data type stored in contiguous memory locations, allowing for efficient access and manipulation.

Front

What is the syntax to declare an array of integers in C++?

Back

int arrayName[size]; where 'size' is the number of elements in the array.

Front

What is the first legal subscript for an array in C++?

Back

0, as C++ uses zero-based indexing.

Front

What is the last legal subscript for an array declared as int values[5]?

Back

4, because the valid indices are 0 to 4.

Front

How do you access the third element of an array named 'numbers'?

Back

You can access it using numbers[2], since indexing starts at 0.

Front

What will the following code display? int numbers[5] = {99, 87, 66, 55, 101}; cout << numbers[1];

Back

87, as it accesses the second element of the array.

Front

What is the difference between an array and a variable in C++?

Back

An array can hold multiple values of the same type, while a variable holds a single value.

Front

What is the purpose of the 'sizeof' operator in relation to arrays?

Back

It returns the total number of bytes used by the array, which can be used to determine the number of elements.

Front

How do you initialize an array with specific values in C++?

Back

You can initialize it using curly braces, e.g., int arr[] = {1, 2, 3};.

Front

What happens if you try to access an out-of-bounds index in an array?

Back

It leads to undefined behavior, which may cause a program crash or unexpected results.